Build Your Own "Tinny Amp" small amplifier.

Here I will show you how to construct a small amplifier for your guitar, should be about 3 watts and run off a 9 volt battery.

Step 1: Parts

You Will Need:
-Soldering Iron
-Tin or box of some kind (or cigarette packet)
-1/4 inch jack input
-Wire
-9v battery clip
-9v Battery
-Speakers (I got mine from an old broken pair of speakers.)
-Amp i decided to use a 3.5 Watt amp from my local electronics store.

Comments

[Misac-kun]

Damn can't find an amp circuit like yours on my country! just the old lm386

[jhayahr1018]

I have a pair of 3 way 6ohm speaker with 100 watts output power, I want it to be a stand alone speaker I want to use the amplifier of the multimedia speaker will it work?

[benjaminmailloux]

 Any help on how to find an amp like this? Searching Radio Shack's site is getting me nowhere. 

Thanks! This is a great project!

[bittu 1]

can we maka  amplire from aportable radio

[Phantomn]

 Well at first i used the amp from some old speakers but it didn't fit so i picked that one up at maplin. It really depends on how much current it needs to drive it and how loud you want it to be. Just wire it up quickly and test it =]

[starchild65]

when you use a amplifiyer from a woofer like the one you took fro your speakers, how do you wire it up properly, i connected a speaker, jack and battery but i'm not getting much sound, you can bearly hear it, if you could explain how to wire everything up would be great. thanks 

[Phantomn]

I actually bought my amp from a shop which came with wiring schematics, so i'm not sure. But it may be because it is from a subwoofer that the output is low, especially if you're pushing it through a small speaker it might not be able to handle it. The amp i removed was from one of the stand alone speakers which may have more treble response, or it could be the fact the battery cannot power it and it requires more power. But on every amp the wiring will be different and i'm not sure it'll help. Mine was wired up as per the schematic. (above)

[foxtrot4697]

is this loud enough to hear in a room with more people playing guitar with amps?

[Phantomn]

It's not very loud mainly due to the size restrictions, i.e the speakers are too small. But in a practice situation it's not really got the power. But it does take it to about an acoustic level. I designed it more for quiet practicing in front of the computer.

[Light DaX]

I've build on with no speaker but a stereo jack out so i can plug in my headphone works great

[SNiPERSeyes]

uncle joes balls ? whats that supposed to mean but incredible project now i can play at my friends place without lugging a huge amp with me thanks!

[dosadi]

Your amp is starved for power. A 3.5 Watt amp will need approximately 1 Ampere of current to run at full power. A 9 Volt battery doesn't even get close to that. You're probably lucky to get 0.5 Watts out of the current setup. I would suggest trying a decent power supply before replacing the speaker. A larger speaker will need more power anyway.

[Phantomn]

Apparently it requires a peak current of 500mA and an operating voltage of 4.5-12v. I will most probably add a DC in at some point in the future